I remember that it I felt embarassed and was frankly a bit ashamed that I hadn't received a reply. It took a while before I realized that I had in fact gotten ghosted as well. I waited for a reply from them for weeks. My self esteem took a definite hit from that. This was about 5 years ago now, so I've since gotten over it - but it changed my perception of Google as an employer from a place I'd be lucky to work at, to a place that I would have a really hard time applying for a job at again.